sys_socket.c revision 1.37.2.5
1 /* $NetBSD: sys_socket.c,v 1.37.2.5 2004/11/14 08:15:57 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)sys_socket.c 8.3 (Berkeley) 2/14/95 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.37.2.5 2004/11/14 08:15:57 skrll Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/file.h> 40 #include <sys/mbuf.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/ioctl.h> 45 #include <sys/stat.h> 46 #include <sys/poll.h> 47 #include <sys/proc.h> 48 49 #include <net/if.h> 50 #include <net/route.h> 51 52 struct fileops socketops = { 53 soo_read, soo_write, soo_ioctl, soo_fcntl, soo_poll, 54 soo_stat, soo_close, soo_kqfilter 55 }; 56 57 /* ARGSUSED */ 58 int 59 soo_read(fp, offset, uio, cred, flags) 60 struct file *fp; 61 off_t *offset; 62 struct uio *uio; 63 struct ucred *cred; 64 int flags; 65 { 66 struct socket *so = (struct socket *) fp->f_data; 67 return ((*so->so_receive)(so, (struct mbuf **)0, 68 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 69 } 70 71 /* ARGSUSED */ 72 int 73 soo_write(fp, offset, uio, cred, flags) 74 struct file *fp; 75 off_t *offset; 76 struct uio *uio; 77 struct ucred *cred; 78 int flags; 79 { 80 struct socket *so = (struct socket *) fp->f_data; 81 return ((*so->so_send)(so, (struct mbuf *)0, 82 uio, (struct mbuf *)0, (struct mbuf *)0, 0, uio->uio_lwp)); 83 } 84 85 int 86 soo_ioctl(fp, cmd, data, l) 87 struct file *fp; 88 u_long cmd; 89 void *data; 90 struct lwp *l; 91 { 92 struct socket *so = (struct socket *)fp->f_data; 93 struct proc *p = l->l_proc; 94 95 switch (cmd) { 96 97 case FIONBIO: 98 if (*(int *)data) 99 so->so_state |= SS_NBIO; 100 else 101 so->so_state &= ~SS_NBIO; 102 return (0); 103 104 case FIOASYNC: 105 if (*(int *)data) { 106 so->so_state |= SS_ASYNC; 107 so->so_rcv.sb_flags |= SB_ASYNC; 108 so->so_snd.sb_flags |= SB_ASYNC; 109 } else { 110 so->so_state &= ~SS_ASYNC; 111 so->so_rcv.sb_flags &= ~SB_ASYNC; 112 so->so_snd.sb_flags &= ~SB_ASYNC; 113 } 114 return (0); 115 116 case FIONREAD: 117 *(int *)data = so->so_rcv.sb_cc; 118 return (0); 119 120 case FIONWRITE: 121 *(int *)data = so->so_snd.sb_cc; 122 return (0); 123 124 case FIONSPACE: 125 /* 126 * See the comment around sbspace()'s definition 127 * in sys/socketvar.h in face of counts about maximum 128 * to understand the following test. We detect overflow 129 * and return zero. 130 */ 131 if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) 132 || (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) 133 *(int *)data = 0; 134 else 135 *(int *)data = sbspace(&so->so_snd); 136 return (0); 137 138 case SIOCSPGRP: 139 case FIOSETOWN: 140 case TIOCSPGRP: 141 return fsetown(p, &so->so_pgid, cmd, data); 142 143 case SIOCGPGRP: 144 case FIOGETOWN: 145 case TIOCGPGRP: 146 return fgetown(p, so->so_pgid, cmd, data); 147 148 case SIOCATMARK: 149 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 150 return (0); 151 } 152 /* 153 * Interface/routing/protocol specific ioctls: 154 * interface and routing ioctls should have a 155 * different entry since a socket's unnecessary 156 */ 157 if (IOCGROUP(cmd) == 'i') 158 return (ifioctl(so, cmd, data, l)); 159 if (IOCGROUP(cmd) == 'r') 160 return (rtioctl(cmd, data, l)); 161 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 162 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0, l)); 163 } 164 165 int 166 soo_fcntl(fp, cmd, data, l) 167 struct file *fp; 168 u_int cmd; 169 void *data; 170 struct lwp *l; 171 { 172 if (cmd == F_SETFL) 173 return (0); 174 else 175 return (EOPNOTSUPP); 176 } 177 178 int 179 soo_poll(fp, events, l) 180 struct file *fp; 181 int events; 182 struct lwp *l; 183 { 184 struct socket *so = (struct socket *)fp->f_data; 185 int revents = 0; 186 int s = splsoftnet(); 187 188 if (events & (POLLIN | POLLRDNORM)) 189 if (soreadable(so)) 190 revents |= events & (POLLIN | POLLRDNORM); 191 192 if (events & (POLLOUT | POLLWRNORM)) 193 if (sowritable(so)) 194 revents |= events & (POLLOUT | POLLWRNORM); 195 196 if (events & (POLLPRI | POLLRDBAND)) 197 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) 198 revents |= events & (POLLPRI | POLLRDBAND); 199 200 if (revents == 0) { 201 if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { 202 selrecord(l, &so->so_rcv.sb_sel); 203 so->so_rcv.sb_flags |= SB_SEL; 204 } 205 206 if (events & (POLLOUT | POLLWRNORM)) { 207 selrecord(l, &so->so_snd.sb_sel); 208 so->so_snd.sb_flags |= SB_SEL; 209 } 210 } 211 212 splx(s); 213 return (revents); 214 } 215 216 int 217 soo_stat(fp, ub, l) 218 struct file *fp; 219 struct stat *ub; 220 struct lwp *l; 221 { 222 struct socket *so = (struct socket *)fp->f_data; 223 224 memset((caddr_t)ub, 0, sizeof(*ub)); 225 ub->st_mode = S_IFSOCK; 226 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 227 (struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0, l)); 228 } 229 230 /* ARGSUSED */ 231 int 232 soo_close(fp, l) 233 struct file *fp; 234 struct lwp *l; 235 { 236 int error = 0; 237 238 if (fp->f_data) 239 error = soclose((struct socket *)fp->f_data); 240 fp->f_data = 0; 241 return (error); 242 } 243
Indexes created Tue Sep 30 10:09:55 GMT 2025